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I will georeference scanned maps and imagery in qgis
Rifas R
About this gig
I will provide precise georeferencing and georectification services for your spatial data
I transform your non-spatial images into accurate, GIS-ready data layers. Using professional QGIS software, I ensure your maps are perfectly aligned for research, urban planning, environmental analysis, and visualization projects.
I WILL GEOREFERENCE YOUR:
- Scanned maps and PDF plans
- Historical maps and archival drawings
- Aerial imagery and drone photos
- Satellite images and old surveys
- Architectural blueprints and site plans(AutoCAD drawings *.dwg)
YOU WILL RECEIVE:
- High-accuracy alignment with low RMSE.
- Support for WGS84, UTM, and other coordinate systems.
- Outputs in GeoTIFF, PDF, KMZ, JPEG with World File.
- Quality assurance and a basic summary report.
PACKAGES:
- BASIC: For a single, clear map or image.
- STANDARD: For multiple maps or higher precision needs.
- PREMIUM: For complex projects requiring top accuracy and priority delivery.
Message me to discuss your project details before ordering!
Get to know Rifas R
Rifas R
GIS and Remote Sensing Specialist
- FromSri Lanka
- Member sinceOct 2025
- Avg. response time1 hour
- Last delivery6 months
Languages
Tamil, English, Sinhala
As a Geospatial Data Analyst with a 7-year background in Survey Engineering, I offer end-to-end GIS expertise. Using QGIS and Google Earth Engine, I deliver precise georeferencing, flawless digitizing, insightful thematic mapping, and detailed terrain analysis. I am dedicated to transforming raw spatial data into accurate, professional-grade outputs that support your project's critical objectives.
FAQ
What information do you need from me to start the georeferencing process?
To ensure the highest accuracy, I typically need: 1) Your scanned map or image file (PDF, JPG, TIFF, etc.). The location the map represents (e.g., "Downtown Boston" or coordinates). 2) The desired Coordinate System (e.g., WGS84, UTM Zone 15N)
How do you measure the precision and accuracy of your work?
I use the Root Mean Square Error (RMSE), which is the standard metric for measuring georeferencing accuracy. A lower RMSE means higher precision.
My map is old/historical and doesn't have clear landmarks. Can you still georeference it?
Absolutely. Georeferencing historical maps is a common and specialized task. I use known geographic features like coastlines, river intersections, historic street corners, or mountain peaks as control points. For such projects, I recommend the STANDARD or PREMIUM package for the extra time and care.
What file formats will I receive after the work is complete?
You will receive the georeferenced image file along with the necessary world file. Common delivery formats include GeoTIFF (most widely compatible with GIS software) or a JPG/PNG with a .jgw/.pgw world file. I can also provide KMZ files for Google Earth. Just let me know your preferred format.
What if the georeferenced map isn't aligned correctly?
Your satisfaction is guaranteed. All packages include free revisions to correct the alignment based on your feedback. Please provide any reference data or specific points you feel are misaligned, and I will promptly correct it.
